What the ice thermal storage in air conditioning systems?

And the process of making ice and store it in large tanks during the night when electricity is cheaper. The manufacture of the ice takes place by passing a solution of water and ethylene level of about -4C by insulated tanks with pure water. This pure water will freeze at 0C. This ice is used during peak times (18h to 21h), turning off the compressors and circulating cold water through them.